Air conditioning system



Aug. 20, 1940. s. J. sHURE AIR CONDITIONING SYSTEM Filed July 24, 1939yWr OR MANUAL ANUSTED I OR F IYED N E N lNvENmR v SAMUEL J. SHURE Bf@TORNEY Patented Aug. 20, 1940 UNITED STATES PATENT oFFm-E 8 Claims.

This invention relates generally to an air conditioning system and hasfor its objects the provision of a system of the type stated whichcontemplates primarily the unique utilization of one or moreevaporativecondensers or cooling towers, either of the so-calledblow-through or pull-throug types, for exhausting substantial quantitiesof air from a room, space, or enclosure being conditioned andycontrolling the variation and quantity of such exhausted air, whichconveniently revitalizes the air in the conditioned space .by theintroduction of fresh lair, .which readily admits of adjustment forcontrolling the quantity of air exhausted from, and the quantity offresh air admitted into, the space being conditioned, which is extremelyeiilcient in heat absorption and humidity control, and which iseconomical in installation, operation, and maintenance costs.

And with the above and other objects in View, my invention resides inthe novel arrangement, combination, and installation of parts presentlydescribed and pointed out in the claims.

In the accompanying drawing,

Figures 1 to 4, both inclusive, are schematic views of several airconditioning systems embodying and illustrating the present invention.

Referring now in more detail and by reference characters to the drawing,in the preferred embodiment of my conditioning systerr illustrated inFigure 1, A designates the room or space to be air-conditioned, B aconditioning unit, C a compressor, and D preferably an evaporativecondenser, the compressor C being preferably of any conventional type,and the conditioning unit B including a cooling chamber I housing arefrigerant evaporator or cooling coil 2 conventionally connected to thecompressor C.

At its one or so-called upper end, the chamber auxiliary duct 5 with theoutside atmosphere.

At its opposite or lower end, the chamber I has communication with theintake side of a conventional blower 6, whichl in turn, hascommunication on its discharge side through a duct 1 and a register orgrill 8 with the room A.

The condenser D is preferably of the Westinghouse Aquamiser or EV typeand includes a shell or housing 9 so constructed at its one or lower endto provide a water sump I and suitably equipped at or adjacent itsopposite lower and upper ends, respectively, with an intake opening Iland a discharge opening I2. Positioned over the sump III and to theupper side of the intake opening II, is a condenser coil I3conventionally connected to the compressor C and showered with waterfrom a spray-header I4 connected to the discharge side of a pump I5, inturn, connected at its intake side to the sump II).

operatively mounted in the upper portion of the shell 9, is a blower I6connected at its discharge side to the discharge opening I2 andcommunicating at its intake side with the interior of the shell 9 fordrawing air over the condenser coil I3.

As air passes over the coil I3, the heat of the compressor C will bedissipated primarily by.

be either of fixed, manually controlled, or automatic type, and openingat o-ne end into the duct I9 between the damper 2 I and the intakeopening I I and opening at the other end to atmosphere, is an auxiliaryduct 22 likewise controlled by a suitable damper 23. f

In use and operation, the damper 2| is normally set so that air isexhausted from the room A througlthe duct I9 while air is admittedthrough the auxiliary duct 5. The balance of the air required fo-rproper operation of the evaporative condenser D is supplied from theauxiliary duct 22 by appropriate setting of the damper 23. Meanwhile thebulk of the air in the room A is recirculated through the conditioningunit B, being Withdrawn through the duct 3 and returned through the duct1, together or combined with the fresh air drawn in thro-ugh theauxiliary duct 5.

If desired, the preferred system may be facilely modified by omittingthe register or grill 4 and elongating the duct 3 for communication orconnection directly with the exhaust duct I9 intermediate the damper 2|and the grill 20, the duct 3 being preferably provided with a suitablecontrol damper 24, all as best seen in Figure 2. Under suchcircumstances, the rate of recirculation of the recycled air in the roomA may be readily controlled by proper adjustment or manipulation of thedamper 24. l

Conveniently also the preferred system ymay include an auxiliaryconditioning space or plenum chamber E, in which event the evaporativecondenser D is installed-directly in the chamber E and connnected lorcommunicated by an exhaust duct 25 to the ambient atmosphere external.to the system, damper-controlled openings 2f, 21, being substituted, asshown in Figure 3, ft or in lieu of the damper-controlled ducts I9, 2

Similarly the opening 21 may be easily connected tothe recirculationduct 3 of the conditioning unit B and the intake opening H of the tevaporative condenser D connected through invention, I provide an airconditioning system which effects a circulation comprising a positiveexhaust from the conditioned space and the introduction thereinto ofsuflicient fresh air or atmosphere, all of which is especially importantin connection with auditoriums, theatres, and the like. The presentsystem also eilects positive exhaust when temperature conditions aresuch that only ventilation is required. Furthermore, the present systemsupplies lower temperature air to the evaporative condenser during thecooling cycle, resulting in more ecient and economical operation.Finally, the present system. eliminates the necessity of a separateexhaust fan and thereby reduces both initial installation and operatingcosts.

It should be understood that changes and modiiications in the form,construction, arrangement, and combination of the several parts of theair conditioning system may be made and substituted for those hereinshown and described without departing from the nature and principle ofmy invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is,

1. An air conditioning system comprising a refrigeration circuitincluding a compressor, a coolingr element and an evaporative condenser,means for continuously withdrawing a relatively small quantity of airfrom the space being conditioned and directing said withdrawn air overthe cooling element for recirculation to said space, means forcontinuously exhausting a substantially large quantity of air from'saidspace and directing the same over the evaporative condenser, and meansfor feeding outside air over said Cooling element and then into saidspace in a quantity substantially equivalent to the quantity of airexhausted through the evaporative condenser.

2. An air conditioning system comprising a refrigeration circuitincluding a compressor, a cooling element and'an evaporative condenser,means for continuously withdrawing a relatively small quantity of airfrom the space being conditioned and directing said withdrawn air overthe cooling element for recirculation to said space, means forcontinuously exhausting a substantially large quantity of air from saidspace and directing the same over the evaporative condenser, means forfeeding outside air over said cooling element and then into said spacein a quantity substantially equivalent to the quantity of air exhaustedthrough the evaporative condenser, and means for optionally bleeding arelatively limited quantity of outside air to the evaporative condenser.

3. In combination with a room, an air con- 4 ditioning system comprisinga refrigeration circuitincluding a compressor, cooling Velement andevaporative condenser, air-impelling means open at its intake side tooutside air and connected at its discharge side for directing arelatively large amount of `fresh air over the cooling element and intothe room, air-exhausting means open at its discharge side to the outsideair and being connected on its intake side for withdrawing -a relativelylarge amount of air from the room and across the evaporative condenser,and means for by-passing la; portion of said exhausted air over thecooling element for recirculation to said space.

4. I-n combination with a room, an air conditioningvsystem comprising a.refrigeration circuit including a compressor, cooling element andevaporative condenser, air-impelling means open at its intake side tooutside air and connected at its discharge f side for directing arelatively large amount of fresh air over the cooling element and intothe room, air-exhausting meansopen at its discharge side to the outsideair and being connected on its intake side for'withdrawing a relativelylarge amount of air from the room and across the evaporative condenser,means for bleeding a small amount of fresh air into the intake side ofthe air exhausting means for passage over the evaporative condenser, andmeans for by-passing an amount of exhausted air over the cooling elementfor recirculation to the room, said amount of recirculated air beingsubstantially equal to the amount of fresh air bled into the intake ofthe air-exhausting means.

5. In combination with a room, an air conditioning system comprising arefrigeration circuit having a compressor, cooling element andevaporative condenser, means for feeding a predetermined quantity ofoutside air across the cooling element and into the room, a plenumchamber opening to said room, an evaporative condenser in said chamber,a shell around the evaporative condenser opening at one end to thechamber and at the other end having communication with outsideatmosphere, blower means disposed within the shell for exhausting fromthe chamber an amount of air substantially equivalent to saidpredetermined quantity and directing said exhausted air across theevaporative condenser to the outside atmosphere, and means forwithdrawing a relatively small quantity of air from the room forrecirculation over the cooling element. y

6. In combination with a room, an air conditioning system comprising arefrigeration circuit having a compressor, cooling element andevaporative condenser, means for feeding a predetermined quantity ofoutside air across the cooling element and into the room, a plenumchamber opening to said room, an evaporative condenser in said chamber,a shell around the evaporative condenser opening at one end to thechamber and at the other end having communication with outsideatmosphere, blower means disposed within the shell for exhausting fromthe chamber an amount of air substantially equivalent to saidpredetermined quantity 4and directing said exhausted air across theevaporative condenser to the outside atmosphere, means for withdrawing arelatively small quantity of air from the room for recirculation overthe cooling element, and means associated withl the evaporativecondenser for bleeding into the shell an amount of outside airsubstantially equivalent to the amount of recirculated air.

7.' In combination with a room, an air conditioning system comprising arefrigeration circuit having a compressor, cooling element andevaporative condenser, means for feeding a predetermined quantity ofoutside air across the cooling element and into the room, a plenumchamber opening to said room, an evaporative condenser in said chamber,a shell around the evaporative condenser opening at one end to thechamber and at the other end having communication with outsideatmosphere, blower means disposed within the shell for exhausting fromthe chamber an amount o1' air substantially equivalent to saidpredetermined quantity and directing said exhausted air across theevaporative condenser to the outside atmosphere, means for withdrawing arelatively small quantity of air from the room for recirculation overthe cooling element, and means for bleeding into the plenum chamber anamount of outside air substantially equivalent to the amount ofrecirculated air.

8. In combination withv a room, an air conditioning system comprising arefrigeration circuit having a compressor, cooling element andevaporative condenser, means for feeding a pref` determined quantity ofoutside air acrossthe cooling element and into the room, a plenumchamber opening to said room, an evaporative condenser in said chamber,a shell around the evaporative condenser opening at one end to thechamber and at the other end having communication with outsideatmosphere, blower means disposed within the shell for exhausting fromthe chamber an amount of air substantially equivalent to saidpredetermined quantity and directing said exhausted air'across theevaporative condenser to the outside atmosphere, means for withdrawing arelatively small quantity of air from the plenum chamber forrecirculation over the cooling element and into the room, and meansconnected at one end to the condenser shell and at one end to theoutside atmosphere for bleeding into the condenser shell a quantity ofoutside air substantially equivalentl to the amount of air recirculated.

SAMUEL J. SHURE.

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